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Fwd: Metal screws for drywalls.

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Sam

If you are intending to use drywall shear walls to resist earthquake forces
I would recommend that you review the availible data before proceeding. 
The lateral resistance deteriorates very rapidly and as a result this
system is not typicaly used.  Also remember that the real earthquake forces
can be significantly larger than those specified by the code.  For brittle
systems, such as that proposed,  the capacity needs to be significantly
larger than the actual forces.  If you follow  through with the logic you
will likely find that the answer is to use another system.

Mark Gilligan

+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
>The contractor wants to use self tapping screws for dry wall shear walls 
over 4" wood studs, instead of nails. It's a 2-layer 5/8" drywall.
Does UBC have shear values for the above system?
Thanks for your help in advance.<


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